Heat exchanger



D. B. BANKS EAT EXCHANGER oct. 21, 1941.

Filed Sept. 2l, 1959 3 Sheets-Sheet l Oct. 2'1, 1941. D. B. BANKS HEATEXCHANGER Filed Sept. 2l, 1939 3 Sheets-Sheet 2 D f 006009600000091...am

Oct. 21, 1941. D. B. BANKS 2,259,604

HEAT EXCHANGER Filed Sept. 2l, 1959 5 Shee'cs-Sheefl 5 `Patented Oct.21, 1941 UNITED STATES 2,259,604 HEAT EXCHANGER Daniel B. Banks, DrexelHill, Pa., assignor to Sun Oil Company, Philadelphia, Pa., a corporationof New Jersey Application September 2.1, 1939, Serial No. 295,928

Claims.

The present invention relates to a heat exchange apparatus of the shelland tube type and, more particularly, it relates to-a removable baillemeans for use in such apparatus.

It is an object of the present invention to provide heat exchangeapparatus which may be readily assembled and dismantled for the purposeof cleaning and the like. It is a further object of the invention toprovide a readily-removable baille plate which will provide a tight sealbetween the baille and the walls of the exchanger. Other objects will beapparent as the description progresses.

For a better understanding of the present invention, reference should bemade to the accompanying drawings in which Fig. 1 is a longitudinalsectional assembly drawing of the apparatus, 1 h

Fig. 2 is a section taken on the line 2-2 of Fig. 1,

Fig. 3 is a section taken on the line 3-3 of Fig. 1,

Fig. 4 is a detail of the end of the baille at the manifold end of theexchanger showing the mechanism for spreading the baille bars at thatend,

Fig. 5 is a detail section taken on the line 5-5 of Fig. 4,

Fig. 6 is a detail section taken on the line 6-6 of Fig. 4,

Fig. 7 is a detail of the free end of the baille,

Fig. v8 is a detail section taken on the line 8-8 oi' Fig. 7, and

Fig. 9 is a detail section taken on the line 9-9 orma-i.

Referring now to the drawings, I0 designates the cylindrical body of theheat exchanger which is provided with flanges II and I2 atthe endsthereof. A tube sheet I3 is h eldbetween the flange II and thecylindrical manifold I4 provided with a central web I5, and the end ofthe exchanger is closed by cover I6. Inlet and outlet lines I1 and I8are provided in the manifold I4. 'Ihe other end of the exchanger isclosed by a cover bolted to flange I2. Heat exchange tubes 2| are rolledinto the tube sheet I3 'and a tube sheet 22. A floating header is formedby tube sheet 22 and cover plate 23 bolted to a segmental ring 24,l thetube sheet 22 being held between the cover plate 23 andsplit ring 24.

A central baille 25 described hereinafter in detail is disposed withinthe cylindrical body I0 of the exchanger. The baille 25 is held againstthe tube sheet I3 by means of tie rods 21 which pass through the tubesheet I3A and extend beyond the opposite end ofthe name 25,. A clip 2spasses 55 'mental overl the end of the baille 25 and the ends of the tierods 21 on the opposite sides of the baille pass through the clip 28 andby tightening the nuts 29 on tie rods 21 the baiile may be pushed rmly 5against the packing 3| in a groove 26 provided in the tube sheet I3 toreceive the end of the baffle 25.

Referring now more particularly to Figs. 3, et seq., the bale 25 isformed of two plates 32 and 33 spaced from each other by spacers 34 andheld together by rivets 35. A longitudinally extending bar 36 isdisposed between the plates 32 and 33 at each edge thereof. Suitablepacking material is provided at the outer edge of the bars 36. As shownin the drawings, this packing material may comprise a compressiblepacking material 31 which is held in place on the edges of the bars 36by a retaining band of a suitable material 30 such as asbestos cloth.This retaining band 36 is stretched over the compressible material 31and is itself secured to the sides of the bars 36 by any suitable meanssuch as rivets. At the ends of the bars 36, nearest the floating head(Fig. 7), an enlarged plate 38 is welded to the end of the bar. 38 and around plug 39 is inserted therein having a threaded hole adapted toreceive the spreader bar 40 provided with opposite threads at itsopposite ends. An opening 4I is provided in each ofthe plates 38 throughwhich the threaded ends of the spreader bar 40 may pass. A plate 43 isWelded to the opposite ends of the bars 36, nearest the tube sheet I3.(Figs. 4, 5, 6 and 9.) These plates 43 extend toward the center of thebaille 25 and are provided with a V groove 44 at their ends. A pointedbolt 45 extends through a hole 46 in the tube sheet I3 and a collar ornut 41 is threaded on to the bolt 45 and is adapted to bear against thetube sheet I3. A cap 48 may be threaded to the tube sheet I3 to coverthe end of' the bolt 45 where it extends therethrough. A cylindricalwell 49 may be provided in the central web `I5 of the manifold I4 in theevent that the exchanger is a two passexchanger so that the manifold I4may be drawn tightly against the tube sheet I3.

y From the foregoing description, the method of assembling ordisassembling the apparatus and the manner of its operation will bereadily ap- 50 parent. For example, whenit is desired to disassemble theapparatus, the cover 20 may be removed from one end of the apparatus andthe cylindrical manifold I4 removed from the other` end of theapparatus. The cover 23 and the segring 24 of thel oating header maythen A hole isrdrilled in the plate drawn from the V groove 44 at theend of the plates 43 thereby releasing one end of the bars 36.

. The other end of the bars 36 may be released by turning the spreaderbar 40 so that the ends of the bars 36 are drawn toward each otherthereby moving the packing 31 away from the walls of the casing I0. Thetube bundle with the baffle 25 therein may then be withdrawn from thebody I of the exchanger by pulling out on the tube sheet I3. After thetube bundle has been removed from the exchanger, the baille 26 mayreadily be removed therefrom by loosening the nuts 29 on tie rods 21thereby permitting the clips 28 of the ends of the baille 25 to beremoved and permitting the baille to be slipped out of the tube bundle.

In assembling the exchanger, the tube bundle, with the baille in placetherein, is inserted into the body I0 of the exchanger, the bars 36 ofcourse being in their contracted position during insertion with" thepointed bolt 45 being withdrawn thereby permitting one end of bars 36 tobe moved toward the center of thebaflle and the other end of bars 36being held in by spreader bar 40 so that the tube bundle may be insertedwithout damaging the packing ,on the baille. When the tube bundle is inplace in the exchanger, the pointedbolt 45 is inserted and its endforced into the V groove 44 thereby moving the plates 43 and theattached ends of bars 36 outwardly. Very little force is applied by bolt45` to the bars 36, its object being merely to change the fulcrum pointof these bars at one end of the baille so that as the spreader bar 40 isturned forcing the other end of the bars 36 outwardly a tight seal willb e made between the walls of the body of the exchanger Illvand thebaille. As the bars 36 are forced apart by turning the spreader bar 40,the packing 31 is compressed and the retaining band vof packing isforced against the side walls of the exchanger and also against theinside of plates 32 and 33 forming the baille, so that a tight seal ismade and practically all of the sealing is accomplished by turning thespreader bar 40. The heads of the exchanger may then be attached and itis ready for use.

What I claim and desire to protect by Letters Patent is as follows:

1. InV a heat exchange apparatus. the combinalongitudinal baile adaptedto be inserted in said casing and comprising a pair of spaced apartparallel plates, a longitudinal bar inserted between said plates at eachof the longitudinal edges thereof, said bars being of greater lengththan said casing and having a threaded opening in their ends nearestsaid smaller tube sheet, a spreader bar having opposite threads at-itsopposite ends engaging said threaded openings, tie rods passing throughsaid larger tube sheet and extending to the far end of said baille,means for attaching said tie rods to said bafile at its end nearest saidsmaller tube sheet to thereby press said baille against said larger tubesheet. extensions on said longitudinal bars at their end nearest saidlarger tube sheet extending toward the center of said baille, and a bolthaving a pointed end extending through said larger tube sheet, andadapted to enter between said extensions on said longitudinal bars andforce them apart.

3. In that type of heat exchange apparatus which comprises a cylindricalcasing, tube sheets and a bundle of tubes extending between the tubesheets and removable with the tube sheets from the casing, a bafflecomprising a pair of spaced apart yparallel plates extending from onetube sheet toward, and terminating short of, the

tion with a casing and a tube bundle adapted to be inserted therein, ofa longitudinal baille comprising a pair of spaced apart parallel plates,a longitudinally extending bar inserted between said plates at each ofthe longitudinal edges thereof, a spreader bar at one end of saidlongitudinal bars, said spreader bar being provided with oppositethreads on its opposite ends, a'

threaded opening in each of said longitudinal bars adapted to receiveone end of said threaded spreader bar, and a wedge adapted to beinserted between the other end of said longitudinally extending bars tospread them apart while said tube bundle is within the casing.

2. In a heat exchange apparatus, the combination with a casing and atube bundle adapted to be inserted therein. said tube bundle comprisinga relatively small diameter tube sheet which is adapted to pass throughsaid casing and a rela- .tively large diameter tube sheet which isadapted to abut against one end of said casing and close the same and amultiplicity oi tubes oi greaterother tube sheet, longitudinallyextending bars between said plates at opposite longitudinal edgesthereof, sealing means betweenY the longitudinal edges of said bars andthe inner wall of said casing, and means to spread corresponding ends ofthe bars laterally toward the casing; the improvement which compriseswings extending inward from the other ends of said bars tosaid bars andoperable to be moved longitudinally between the inner ends of said wingsand thereby spread the corresponding ends of the bars laterally to soposition their fulcrums as to enable said bars to compress said sealingmeans and thereby make a tight seal between the longitudinal edges ofthe bars and said casing throughout the length of the bars.

4. In that type of heat exchange apparatus which comprises a cylindricalcasing, tube sheets and a bundle of tubes extending between the tubesheets and removable with the tube sheets from the casing, a bafflecomprising a pair of spaced apart parallel plates extending from onetube sheet toward, and terminating short of, the other tube sheet,longitudinally extending bars between said plates at oppositelongitudinal pair Lof said tie' rods and spanning said end of thebaille, means to press said cross-pieces against said end of the bailleand thereby force its other end against the `first named tube sheet, amember extending through-the first named tube sheet .and operable tospread the corresponding ends of the said 'bars laterally against thecasing wall and fulcrum the same thereon, and independthe ends of thebars operable bythe spreading ently operable means to spread theopposite ends member comprise inwardly extending wings and of the bars,thereby compressing said sealing in which said spreading member extendsalong means to make a tight seal between the longithe axis of the casingand is movable longituditudinal edges, 0f the bars and Said casing 5nally between said wings to effect the spreading throughout the lengthof the bars. action specied.

5. The construction dened in claim 4 in which DANIEL B. BANKS.

